Well I've designed and built my own control system, there is a how too guide on my homepage, I'm actually a controls engineer
http://www.mordor.plus.com/Control.html
I designed this control system with the novice programmer in mind, hence the rather unusual step of using Excel as the control platform
The great thing about using Excel (In my opinion) is that anyone who has a basic understanding of spreadsheets can easilly program themselves a haunt.
The control board can be built with relatively cheap and easy to obtain hardware, and besides the IO boards you are free to use pretty much any controls gear you want.
http://www.mordor.plus.com/Control.html
I designed this control system with the novice programmer in mind, hence the rather unusual step of using Excel as the control platform
The great thing about using Excel (In my opinion) is that anyone who has a basic understanding of spreadsheets can easilly program themselves a haunt.
The control board can be built with relatively cheap and easy to obtain hardware, and besides the IO boards you are free to use pretty much any controls gear you want.